Cant find the discussion meta box under edit page

Hello, Im trying to add comments under some of my pages, but cant seem to figure out how. Ive read, that it can be enabled in a “Discussions” box, when editing a specific page, however it is nowhere to be found. I do have the box “Allow people to post comments on new articles” in Settings->Discussion checked. I also tried switching to basic theme and I deactivated all plugins. I have WPDiscuz plugin, but dont really know what to do.
If there is a more simple way to implement comments please let me know.
Thank you so much in advance

closing in favor of: Cant find the discussion box, so that i can enable comments on the bottom of each page